Provided by: libcurl4-doc_7.81.0-1ubuntu1.20_all bug

NAME

       CURLOPT_LOCALPORTRANGE - number of additional local ports to try

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_LOCALPORTRANGE,
                                 long range);

DESCRIPTION

       Pass  a long. The range argument is the number of attempts libcurl will make to find a working local port
       number. It starts with the given CURLOPT_LOCALPORT(3) and adds one to the number for each retry.  Setting
       this  option  to  1 or below will make libcurl do only one try for the exact port number. Port numbers by
       nature are scarce resources that will be busy at times so setting this value to something too  low  might
       cause unnecessary connection setup failures.

DEFAULT

       1

PROTOCOLS

       All

EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/foo.bin");
         curl_easy_setopt(curl, CURLOPT_LOCALPORT, 49152L);
         /* and try 20 more ports following that */
         curl_easy_setopt(curl, CURLOPT_LOCALPORTRANGE, 20L);
         ret = curl_easy_perform(curl);
         curl_easy_cleanup(curl);
       }

AVAILABILITY

       Added in 7.15.2

RETURN VALUE

       Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

       CURLOPT_LOCALPORT(3), CURLOPT_INTERFACE(3),